Videos in tweening MovieClips load only sometimes?

FYI - This is not an “oops, I didn’t put my component in the right directory”.

So, I’ve been streaming videos with flash for a while, but recently I developed my first full flash website and when I put multiple videos on the video page that slides in, they sometimes don’t appear. But if I click around on different pages and come back, sometimes they do?

I think it is a loading issue, maybe I need some action-script on the Movie-Clip that holds the FLV component?

Website is -
Just click on “video” on the left hand side of the page.

I can just see the frustration on a youth pastors face when their video does not appear for one clip, but it does for another. Let me know if it works/suggestions/has the same problem from any one else. Thanks!